Wood-pulp grinder.



No. 755,989. v PATENTED MAR. 29; 1904.

' v J. H.' BAKER, G. I'. SHEVLIN &AF'.` H. BAKER.'

WOOD PULP GRINDER.

APPLIUATION FILED JULY 16. 1903. l 1.10 IODEL. 2 SHEETS-SHEET 1.

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110-755,989. A 'PATENTED MAR. 29, 1904. J. H. BAKER, G. P. SHBVLIN' A F. H. BAKER.

WOOD PULP GRINDER. APPLICATION Hmm JULY 1e, 1903.

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No.755,989. Patented March 29, 1904..

UNITED STATES PATENT OFFICE.

JAMES H. BAKER, GEORGE F. SHEVLIN, AND IFREDERICK H. BAKER, OF SARATOGA SPRINGS, NEW YORK, ASSIGNORS TO BAKER AND SHEVLIN COMPANY, OF SARATOGA SPRINGS, NEW YORK, A CORPORATION OF' NEW YORK. l

woon-PULP GR'INDER.

SPECIFICATION forming part of Letters Patent No. r755,989, dated March 29, y1904. Application filed July 16, 1903. Serial No'I 165,752. (No model.)

T u @Uh/0m' t ma!! OOWUWW a securing ange, and leg-supports are se- Be it known that We, JAMESv I-I. BAKER, cured thereto, and at their upper ends a hop- GEORGE F. SHEVLIN, and' FREDERICK H. per cof cast metal and of circular form is con- 50- BAKER, citizens of the United States, residing neoted to these leg-supports. The base of the at Saratoga Springs, in the county of Sarahopper islmade as acurved annular trough c', toga and State of New York, have invented inclined at both sides froma given point to an an Improvement in Wood-Pulp Grinders, of opposite discharge-aperture, and the same is which the following is a specification. formed with parts adapted to set upon and be 5 5 Our present invention is designed as an imconnected to said leg-supports. Io provement upon the device shown and dedis a discharge-throat extending downward scribed in our Letters Patent No. 614,316, from and connected to the discharge-aperture granted November 15, 1898, and the same reof the hopper. The hopper is provided with a lates to Va device for grinding and refining the top or cover e, preferably of cast metal, with an 60 residuum from ground wood, sulfite, and open center and `with ribs upon the under side, soda pulp, with the object of utilizing what and to the under side of the cover the upper or heretofore has usually been waste materials Stationary stone 71 is connected and made fast or screenings. In our present improvement in any desired or well-known manner. The we employ grinding stones horizontally cover and the stone are each made with an 65 placed, the one fixed-and stationary and the open center, which open centers are of subzo other adapted to revolve ata highspeed. The stantially the same diameter.

inner adjacent corners of the-stones are bev- The devices providing an entrance for the eled or cut away, and the opposite faces are residuum from ground-wood, sulflte, or soda provided with tapering channels toreceiverthe pulp comprise a casting in which there is an 70 entering stock and convey the same between inclined throat f, a circular base f, fitting vthe roughened grinding-faces of the stones. within the open centers of the cover andsta- We provide entrance and exit means for the tionary stone, and a dishing or concave top, materials being treated, means in the center the said casting having an aperture providing of the stones for pulling down the entering a hand-hole approximately opposite to the 75 materials and forcing the same outward toinclined throat and closed with a removable ward the stones and into their channels, and cover f3. There are adjusting-screws 2 passmeans for raising and lowering the lower and ing through this top f2 Vat opposite sides, and revoluble stone, so as to adjust the same with a ring or annulus g, concentric with the said reference to the stationary stone, and other top f2 and which is supported and centered 8O devices for holding the parts as adjusted, all by the screws 2. Through the annulus or 3 5 of which are hereinafter more particularly dering g there are other adjusting-screws, 3, at scribed. opposite points and intermediate of the screws In the drawings, Figure 1 is a vertical sec- 2, which pass through the ring or annulus g tion representing the machine embodying our and take bearings in the sleeve L1 to support 35 improvements. Fig. 2 is a plan of the lower the same and to hold said sleeve in the axial stone and the platform structure carrying the center of the machine.

same. Fig. 3 is a sectional plan at of A pulley g is provided with a pulley-sleeve Fig 1. Fig. L is al sectional plan at y y of 5, and this sleeve .5 is within the vbearing- Fig. 1, and Fig. 5 is a plan of the worm or sleeve 4 and surrounds the shaft L, said pul- 90 device in the center of the stones for pulling ley-sleeve being connected to said shaft It by down the entering materials and forcing the a spline and groove, so that the two are caused same outward. l to turn together, the power being communi- The cast base a is preferably provided with cated for the rotation of the shaft by said pulley g and sleeve 5. We provide a circular platform having a rising edge or peripheral iange and spaced-apart internal ribs, and a hub 6 is made integral with this circular platform and has a tapering aperture. This circular platform is provided with beaterwings on the under side, which are preferably formed integral therewith. rl`hese wings are curved in plan, Fig. 2, and are preferably tapering, with semicircular ends, as shown in Fig. l, and the office of these beater-wings is to move the stock that is being treated after the same passes out of the stones into the annular trough c and progressively move the same toward the discharge-throat. The revoluble stone Z is received upon the platform /c and is secured thereto in any desired or wellknown manner.

The shaft /t is provided with a tapering enlargement 7 and a shoulder, and the hub 6 of said platform fits upon the taper enlargement, rests upon the-shoulder, and is preferably connected to the taper enlargement by a spline and slot. The shaft L above the taper enlargement 7 is threaded, the threads terminating at the taper enlargement, and upon this threaded portion is a nut 8, the oice of which is to force the hub 6' of the platform down upon the taper enlargement to the shoulder and connect the said parts securely. rI`he stationary stonez' and the revoluble stone Z have their inner adjacent corners t and Z cut away, and the juxtaposed faces of said stones are provided with curved tapering channels i Z2, and the Hat juxtaposed surfaces are suitably roughened. Within and between the stones there is thus created quite an area or receptacle for the entering stock or residuum from the ground-wood, suliite, or soda pulp, and we employ a concave worm m, surrounding the shaft and connected to the shaft by a bolt 9, which prevents displacement. The base of this conical worm is hollow and fits over the nut 8 and the adjacent threaded portion of the shaft and rests upon the surface of the stone in the central recess, and the surface of said worm ym is provided with blades m', that are spirally arranged upon the conical surface of the worm, the function of said blades being to both draw down the residue stock into the machine and to force the sameA outward into the cut-away portions and channels of the stones.

The annular trough of the hopper is provided with aring-center c2, and a hollow sleeve oz, is securely connected thereto. The lower end of the shaft /t carries a steel step 10, and this in turn rests upon the pair of steel disks l1, which are perforated, and the steel disks in turn restupon a steel plate 12, that is preferably both grooved and perforated. Around the lower end of the shaft and the steel step,

as well as the said disks, there is a bronze bushing 13, perforated, and we provide a bottoni step-block o and a step-sleeve o', connected to the periphery of said step-block, the stepblock being made with a screw-stem u2, which extends downward into a central aperture in the base a.

We provide a circular apertured plate r, secured to the center of the cast base a, and a sleeve s, flanged and interiorly threaded, occupies a position in the recessed center of the hase, and the liange thereof cornes between the plate fr and the surface of said base, the said sleeve being free to rotate, but being fixed with regard to an upward, downward, or lateral movement. A hand-wheel t is fast upon the periphery of the sleeve s at its upper end, and we provide a clamp u, adapted at one end to be connected to the hand-wheel and its other end to the leg-support L. The hollow sleeve structure n, the steel step and disks, the steel plate, and the bronze bushing, while convenient in this structure, form no necessary part of ourpresent invention, as the same have been heretofore described and claimed in other and prior applications and patents by us, the same forming devices for oiling and cooling the bearing at the lower end of the high-speed shaft 7L.

In the operation of the structure the stepsleeve o' and the hollow sleeve n bear a fixed relation to one another-that is to say, we prefer to providea slot and spline connecting the two, so as/to prevent the rotation of" one with reference to the other, but yet to make a vertical movement of the one 'with reference to the other possible, in view of which the step-block o and the screw-stem o2 are adapted to rise and fall, but not to turn. The turning movement is produced by the hand-wheel t and the sleeve s, which are connected rotatably together, said sleeve being interiorly threaded to match the exterior thread of the screw-stem 02, so that when the hand-wheel t is rotated and the sleeve s With it a rising or falling movement is imparted t-o the said screw-stem, step-block, the step-sleeve and step, the shaft L, the platform L", and the revoluble stone l, so as to bring the juxtaposed surfaces of the respective stones nearer together or farther apart.

The clamping device u is preferably pivotally connected to the leg-support b and grasps the peripheral rim of the hand-wheel t, and thus holds the wheel in position, and thereby retains the vertically-adjustable parts in position as determined and set.

We claim as our invention# 1. The combination with a circular hopper, a cover therefor and stationary stone carried thereby, of a circular platform, a revoluble stone carried thereby, a shaft to which the platform is secured, a step at the lower end of the shaft, devices upon which the said step rests, a step-block having an integral screwstem, a step sleeve connected to the stepblock and surrounding the shaft and step, an interiorly-threaded anged sleeve secured to IOO IIO

said step, a hand'- wheel connected to said sleeve, and a plate connected to the bed of the machine and receiving said ianged sleeve, and a clamp for connecting the hand-wheel to a fixed point.

2. The combination in a wood-pulp grinder with a base and leg-supports, of a circular horizontally-placed hopper having a curved annular trough inclined in opposite directions toward a discharge-throat, a circular, horizontally-placed-'cover or top having an open center,.a fixed or stationary stone connected to the under side of said cover and also having an open center, a circular horizontallyplaced platform, a vertical shaft, a horizontally-placed revoluble stone connected to said platform, devices for feeding the stock or residuum to the center of the stones for their operation, and devices for supporting the revoluble stone and adjusting the surfaces of the stones with reference to one another.

3. The combination in a wood-pulp grinder, of a circular horizontally-placed hopper having a curved annular trough inclined in opposite directions toward a discharge-throat, a circular horizontally-placed cover or top having an open center, a fixed or stationary stone connected to the under side of said cover and also having an open center, a circular horizontally-placed platform, a vertical shaft, a horizontally-placed revoluble stone connected to said platform, said circular platform having a flanged periphery and beater-wings on the under side of the platform curved in plan and tapering'in elevation and moving through the curved annular trough of the hopper for bringing the material Ycontained therein to the discharge-aperture, devices for feeding the stock or residuum to the center of the stones for their operation, and devices for supporting the revoluble stone a-nd adjusting the surfaces of the stones with reference to one'another.

4. The combination in a wood-pulp grinder with a base and leg-supports, of a circular horizontally-placed hopper having a curved annular trough inclined inlopposite directions toward a discharge-throat, a circular horizontally-placed cover ortop having an open center, a fixed or stationary stone connected to the under side of said cover and also havingv an open center, a circular horizontally-placed platform, a vertical shaft, a horizontallyplaced revoluble stone connected to said plat-- form, said fixed and stationary stones having their inner adjacent corners beveled or cut away and the opposite juxtaposed faces of said stones provided with taper channels and their fiat juxtaposed surfaces roughened.

5. The combination in a wood-pulp grinder, with a base and leg-supports, of a circular horizontally-placed hopper having a curved annular trough inclined in opposite directions toward a discharge-throat, acircular horizontally-placed cover or top having an open center, a fixed or stationary stone connected to the under side of said cover and also having an open center, a circular horizontally-placed platform, a vertical shaft, a horizontallyplaced revoluble stone connected to said platform, a conical worm structure surrounding the driving-shaft within the hollow centers of the respective stones and acting to pull down the stock and to force the same out laterally.

6. The combination-in a wood-pulp grinder with a base and leg-supports, of a circular horizontally-placed hopper having a curved annular trough inclined in opposite directions toward a discharge-throat, a circular horizontally-placed cover or top having an open center, a fixed or stationary stone connected to the under side of said cover and also having an open center, a circular horizontally-placed platform,a vertical shaft, a horizontally-placed revoluble stone connected to said platform, the said fixed and stationary stones having their inner adjacent corners beveled or cut away and the opposite juxtaposed faces of said stones provided with taper channels and their fiat juxtaposed surfacesroughened, and a conical worm device comprising a sleeve, a hollow curved base and spiral surface blades surrounding the driving-shaft and located in the hollow centers of the stones andacting to pull down the material being treated and force the same out laterally into the channels and between the surfaces of the stones.

7, In a wood-pulp grinder, the combination with a circular hopper horizontally placed, of a ,circular cover also horizontally placed, a stationary stone connected to the under surface of said cover, said cover and stone each having an open center, a structure forming an inlet for the material to be treated and comprising an inclined throat, a circular base fitting the open centers of the cover and stone, a dishing top and a removable hand-hole cover, a vertically-placed central power-shaft, a bearing therefor in the said dishing top, acircular revoluble platform connected to said shaft, a revoluble stone horizontally placed carried by said platform, and a suitable bearing for the lower end of said shaft.

8. In a wood-pulp grinder, the combination with a circular hopper horizontally placed, of a circular cover also horizontally placed, astationary stone connected to the under surface of said cover, said cover and stone each having an open center, a structure forming an inlet for the material to be treated and comprising an inclined throat, a circular base fitting the open centers of the cover and stone, a dishing top and a removable hand-hole cover, a vertically-placed central power-shaft,a bearing therefor in the said dishing top, a circular revoluble platform connected to said shaft, a

revoluble stone horizontally placed carried by said platform, a suitable step-bearing for the lower end of said shaft,` adjustable revoluble devices for raising andv lowering the shaft,

IIO

the circular platform and the revoluble stone to adJust the juxtaposed Surfaces of the two stones, and means for clamping the parts as desired.

9. In aWood-pulp grinder, the combination with a horizontally -placed stationary stone 'having an open center, a circular revoluble platform and horizontally-placed revoluble stone carried thereby having a partial open center, a taper enlargement upon said shaft, a taper hub to said platform fitting said taper enlargement, a screw-threaded part to the shaft adjacent to the taper enlargement, and a nut upon the shaft for holding the hub of the platform securely in position, and a conical Worm structure with spirally-arranged surface blades upon said shaft and having a hollow base fitting over the said screw-threaded portion and nut and resting upon the revoluble stone.

Signed by us this 30th day of March, 1903.

JAMES H. BAKER. GEO. F. SHEVLIN. FREDERICK H. BAKER.

Witnesses:

LEWIS WAMEY, BEATRICE G. FARRINGTON. 

